Due to the boom in low-rise housing is an active search for materials, the use of which makes it possible to build a house cheap and technologically at achieving high performance properties. Such material exists and is used in construction, it has a GOST 24329-80 and it is called mechanochemically modified wood. This wood is impregnated with a solution of the modifier (mostly - carbamide), dried under variable pressure and heat-treated for the purpose of acquisition and development of the specified properties.
Why wood? Because wood indoors updates to 30% of air per day, and natural properties of this material allow to dry weather to give the accumulated moisture in wet - to absorb the excess. Wooden houses are distinguished by a special microclimate and high level of comfort, even without the use of additional funds conditioning. Regarding the mechanical properties of wood densities comparable to those of metals and insulating properties is competitive with other types of construction materials.
Why urea? Urea solution in water because of the small molecules of urea can penetrate the cell cavities of wood substance and drenches wood logging of any thickness. Urea under the temperature and pressure to react with the wood material components such as lignin beer glasses and hemicellulose, and without disturbing the macrostructure timber modifies the chemical structure of these components to form substances such as urea resins used in the production beer glasses of modern plate materials.
Due to this timber becomes beer glasses more durable and solid, unaffected by micro-organisms (molds, fungi), and chemicals, and additives that are compatible with the modifier, may make it fully or partially hydrophobic and non-combustible. At a certain stage process technology modified wood becomes flexible and can be easily deformed by heat and pressure. beer glasses Urea is eco-friendly, as on the effects on humans and animals - is chemically neutral and even used as a feed supplement for cattle.
If you need high strength or hardness of mechanically modified wood (MHMD), or making the product a predetermined shape or profile, then held termopressovanie, bending or termoprokat dried wood.
As a result MHMD set the dates for the customer design, strength and performance characteristics shown in the table. beer glasses Breed of the original timber has little effect on the final properties of the modified wood and therefore cost-effective to apply for modification of non-business cheap wood.
Can be applied to produce industrial standard equipment: heated bath or autoclave impregnation convection or vacuum drying cameras, heat treatment at temperatures up to 200oC. Compression - this hydraulic press with heated plates, bending equipment for bending, termoprokatnye beer glasses installation with specially profiled rollers. Tested until a pilot production scale, special settings for mechano-chemical modification of wood that allow all stages of modification without rebooting blanks compacted preform beer glasses during drying and even give them a specified profile in the drying stage - such as mortise and tenon for structural timber. The use of such systems is very significantly reduces the time and costs of modifying the processing of wood.
Texture
24.5
18.5
10.2
Application of the products of mechanically modified wood in the construction industry can be so varied and almost universal, which is difficult even to answer the question: where to apply MHMD ineffective? However, beer glasses we begin to "dance on the stove." Make MHMD noncombustible really moreover samples of this wood is, and if they are enlarged to 1500-2000 kg/m3, then such "wooden blocks" beer glasses can be folded stove or fireplace. Would be willing to ...
Next - the foundation. Since MHMD very durable, does not rot, microorganisms and chemicals, as well as flame-proof - that production of her columnar or strip foundation suggests itself. As formwork for pouring foundations or walls modified wood is used with 80s and even put into building regulations. Due to its strength, heat resistance and chemical resistance, it can be used as a material for the manufacture of concrete forms and other mortars.
Round logs and timber from MHMD, izgotavlennye in trial version installation wood modification, are different in that they do not need to eat through the cup-shaped longitudinal profile on a log or tongue and a groove on a bar - you can drive out to install in the drying process. So spruce logs diameter 200mm, length 2.5 m, freshly cut, with humidity of 85%, the density
